}
if (_inCallback) { //skip validation check
return true;
}
final Range rng = Ranges.range(sheet, row, col);
final DataValidation dv = rng.validate(txt);
if (dv != null) {
if (dv.getShowErrorBox()) {
String errTitle = dv.getErrorBoxTitle();
String errText = dv.getErrorBoxText();
if (errTitle == null) {